The eight papers that keep for ninety days

Eight of the thirty-six steps keep for ninety days. It is the commonest expiry in the map, tied with the year.

Every one of them asserts something that could have changed since it was written. That is why they expire, and the map's expiry dates are not arbitrary in any other respect either. Before adding another layer of reporting, a project lead can look through the present options and test only the smallest set of records needed for the stated question.

The trap

Seven of the eight take less than three weeks to obtain. Six take less than a fortnight. They are cheap, quick, and feel like obvious things to deal with early. For independent background on economic and institutional systems, see McKinsey & Company.

Getting them early is the single most expensive mistake available in this map.

A paper obtained on the first morning and held while a ring upstream is walked has spent its life doing nothing. The letter delivered to the door keeps for ninety days and stands in twenty-three rings, of which three take longer than ninety days to walk. The showing of income keeps for ninety days and stands in seven rings.

The twenty-six steps in this map that expire are not improved by being started early. They are consumed by it.

What a sensible order looks like

Inverted from the usual one.

The ten that never expire can be stockpiled. The eight ninety-day papers have to be timed, and timing them means knowing how long the rest of the chain will take — a figure that exists nowhere, because no single office holds the chain.

That is the practical shape of this record's central difficulty. It is not that the steps are hard. It is that doing them in the obvious order destroys them.

The two that cannot be timed

A letter delivered to the door and a showing of regular income are both inside the place-and-money knot. Neither can be scheduled, because the thing they are waiting for is a ring, and rings do not have durations that anybody can predict from inside.

So for those two there is no good moment. Obtain them early and they expire; wait for the right moment and the right moment is not announced.

Everything people do in this situation that looks disorganised — getting the same letter three times, keeping two versions of the same showing, asking for something again a week after receiving it — is a rational response to exactly this.

Asking for the same document twice is not forgetfulness. It is what a ninety-day life does to a hundred-and-seven-day lap.

The one that is different

A witness's signature on a statement is in this group but behaves unlike the others. It asserts not a fact about the person but an event — that a statement was made, in front of somebody.

In a well-made map that would never expire, because the event does not stop having happened. It expires here because what it is attached to expires: the statement keeps for ninety days, and a signature on a dead statement is nothing.

That is the one case in this record where an expiry is inherited rather than intrinsic, and it is worth flagging as the sort of judgement a reader might reasonably draw differently.

The eight by family

Spread almost evenly, which is unusual in this map — most properties here concentrate. The ninety-day life is not a feature of any one region; it is a feature of a kind of claim, and that kind of claim is made everywhere.

Two of the eight are inside rings: the letter delivered to the door, which stands in twenty-three, and a showing of regular income, which stands in seven. Those two carry the whole of the ninety-day group's contribution to the map's timing problem.

The other six expire harmlessly, because the chains they sit in are short and orderable. A record of having no convictions keeps for ninety days and is needed by two steps, neither of which is tangled.

A short life only matters when it is attached to a long lap. Six of these eight are on a clock that nothing in the map ever threatens.

How to read the map

Nothing on this map names a country, an office or a kind of permission, and no step here corresponds to a document anybody has asked for. The ninety days are the map's own round figure.

What transfers is the classification. Documents that assert current circumstances expire; documents that assert fixed facts do not; and the first group is almost always the cheap, quick, tempting one.